As businesses ramp up spending on AI tools like Claude, they’re facing so-called “AI sticker shock” — ballooning costs with little productivity gain to show for it.

Claude maker Anthropic said Monday that it confidentially filed to launch an IPO in the U.S. following another huge funding round.

Anthropic, the AI company behind Claude, has confidentially filed for an IPO after reaching a $900 billion valuation, positioning itself among the most closely watched potential…